IMO, Agbaji is a more likely starter than THT.
Markkanen's ideal position is at SF not PF.
Sexton will be a key player. He just needs to play more under control and it looks like he's working on that.
THT and Vando could both be great bench players but neither are good enough shooters at this point.
NAW could also be a nice role player or potential starter as well.
Not sure any of the rest have much of a future with the Jazz. Not sure THT does really either.